Is your roadraft tube clean & is there a breather cap on the valve cover? I'm wondering if you are building up pessure in the crankcase. You could put a little RTV on it & set the timing before it sets up.

Last edited by Wrenchbender Ret.; 11/09/2008 4:20 PM.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.
1972 Chevy c10 Cheyenne Super
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